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Vishay General Semiconductor - Diodes Division P6SMB20CAHM3_B/H
- Part No.:
- P6SMB20CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB20CAHM3_B/H.pdf
- Description:
- 600W,20V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,948
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Product details
Overview
P6SMB20CAHM3_B/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 20 V standoff voltage (VWM), 22.8–25.2 V breakdown voltage (VBR) at 1 mA, 27.7 V maximum clamping voltage (VC) at 21.7 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the P6SMB20CAHM3_B/H datasheet, P6SMB20CAHM3_B/H pinout, P6SMB20CAHM3_B/H application, or P6SMB20CAHM3_B/H equivalent, this device serves as a halogen-free, AEC-Q101 qualified TVS for bidirectional overvoltage protection where low clamping voltage, fast response time, and MSL Level 1 reflow compatibility are critical design requirements.
Technical Context
The P6SMB20CAHM3_B/H operates as a symmetrical avalanche diode, conducting in both directions when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 μA at 17.1 V), while the SMB package enables automated placement and meets UL 94 V-0 flammability rating.
It delivers 600 W peak pulse power handling per 10/1000 μs waveform with <1 ns response time and 0.090 %/°C temperature coefficient of VBR. Thermal resistance is 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), supporting operation from –65 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17.1 V - Maximum continuous reverse working voltage before significant conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 22.8–25.2 V at 1 mA - Voltage at which device enters controlled avalanche; tight tolerance ensures predictable triggering in protection circuits. |
| VC (Clamping Voltage) | 27.7 V at 21.7 A - Maximum voltage seen by protected circuit during 10/1000 μs surge; directly limits stress on downstream components. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy absorption capability under standardized transient; validates robustness against IEC 61000-4-5 surges. |
| IPPM (Peak Pulse Current) | 21.7 A - Peak current the device safely shunts during 10/1000 μs transient; determines minimum trace width and PCB layout margin. |
| TJ max. | +150 °C - Maximum allowable junction temperature; supports high-temperature environments like engine control units and industrial motor drives. |
| Package | SMB (DO-214AA) - Surface-mount package with 0.220" × 0.130" footprint; compatible with standard reflow profiles including 260 °C peak (MSL Level 1). |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminals function identically as anode and cathode depending on transient polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal conducts when voltage exceeds VBR in either direction; no fixed polarity - simplifies PCB layout and eliminates orientation errors. |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamping path across protected line and ground or rail-to-rail. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., CAN, RS-485) without external polarity management. |
| AEC-Q101 qualification | Validated for automotive applications including powertrain and body electronics; supports long-term reliability under thermal cycling and vibration stress. |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance requirements for global OEMs; eliminates brominated flame retardants while maintaining UL 94 V-0 rating. |
| Low clamping ratio (VC/VBR ≈ 1.13) | Minimizes overvoltage exposure during transients - critical for protecting 3.3 V or 5 V logic interfaces adjacent to 24 V supply rails. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; reduces manufacturing overhead in high-volume SMT assembly. |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V power inputs in engine control modules (ECMs) against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed between battery rail and DC-DC converter input to clamp transients up to ±100 V. Use Value: Limits voltage seen by downstream regulators to ≤27.7 V, preventing latch-up or permanent damage during 12 V system surges. |
Use Scenario: Safeguarding analog outputs of pressure sensors in factory automation PLCs exposed to relay coil flyback. IC Role / Device Role / Timing Role: Shunt protector across 4–20 mA loop terminals to divert inductive kickback before it reaches ADC front-end. Use Value: Clamps transients within 1 ns, preserving signal integrity and avoiding false readings or sensor reset events. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Guarding Ethernet PHY interface power pins (e.g., PoE midspan) against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Bidirectional TVS connected from VDDIO to GND on Ethernet controller, rated for IEC 61000-4-5 Level 4 (4 kV). Use Value: Absorbs 600 W peak pulse energy without degradation, enabling single-stage protection without series impedance. |
Use Scenario: Shielding microcontroller GPIOs driving brushed DC motors in smart home appliances from commutation spikes. IC Role / Device Role / Timing Role: Localized TVS at motor driver output stage to suppress >100 V spikes generated during PWM switching. Use Value: Prevents ESD-like latch-up in MCU I/O cells by limiting transient voltage to 27.7 V, even under repeated 21.7 A surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20CA | Same VWM (17.1 V) and VC (27.7 V), but lower PPPM = 400 W; SMA package (smaller footprint, higher RθJA = 140 °C/W). | Less suitable for high-energy surges (e.g., automotive load dump); better for space-constrained consumer PCBs with lower surge risk. | Select SMAJ20CA only if board area is critical and surge energy remains ≤400 W; verify thermal derating above 75 °C ambient. |
| SMCJ20CA | Same VWM and VC, but higher PPPM = 1500 W; larger SMC (DO-214AB) package with lower RθJA = 50 °C/W. | Overqualified for 600 W needs but preferred in industrial motor drives where multi-pulse endurance and thermal margin are essential. | Choose SMCJ20CA when system-level surge testing requires >1000 W headroom or extended duty cycle operation beyond 0.01%. |
Compared with SMAJ20CA and SMCJ20CA, the P6SMB20CAHM3_B/H delivers optimal balance of 600 W surge capacity, SMB footprint, AEC-Q101 qualification, and halogen-free compliance - making it the preferred choice for cost-sensitive, thermally constrained automotive and industrial designs requiring validated reliability.
Availability
P6SMB20CAHM3_B/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom line cards, and consumer appliance motor controls requiring stable component supply with full traceability and lifecycle continuity.
Supply support for P6SMB20CAHM3_B/H includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The P6SMB Series targets high-reliability transient suppression in harsh environments; engineered specifically for AEC-Q101 compliance, low clamping, and automated SMT manufacturability in automotive and industrial systems.
FAQ
What is the clamping voltage of P6SMB20CAHM3_B/H at its rated peak pulse current?
The P6SMB20CAHM3_B/H has a maximum clamping voltage (VC) of 27.7 V at 21.7 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured per JEDEC standards and guarantees that protected circuitry will not experience voltages exceeding 27.7 V during specified transient events. The P6SMB20CAHM3_B/H maintains this clamping performance across its full operating temperature range (–65 °C to +150 °C).
Is P6SMB20CAHM3_B/H suitable for automotive applications?
Yes, P6SMB20CAHM3_B/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It is explicitly rated for use in engine control units, body electronics, and infotainment power supplies where reliability under thermal cycling, vibration, and load-dump transients is mandatory. The P6SMB20CAHM3_B/H data sheet confirms qualification per AEC-Q101 Rev D test conditions.
What does the "CA" suffix mean in P6SMB20CAHM3_B/H?
The "CA" suffix in P6SMB20CAHM3_B/H denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with identical VBR, VC, and IPPM characteristics regardless of voltage polarity. Unlike unidirectional variants (e.g., P6SMB20A), the P6SMB20CAHM3_B/H has no cathode marking and functions as a voltage-clamped bridge across protected nodes.
What is the thermal resistance of P6SMB20CAHM3_B/H?
The P6SMB20CAHM3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W, measured on standard 0.2" × 0.2" copper pads. These values enable reliable operation at full 600 W pulse power only with adequate PCB copper area; derating is required above 25 °C ambient per Figure 2 in the Vishay datasheet 88370. The P6SMB20CAHM3_B/H thermal performance is validated for MSL Level 1 reflow up to 260 °C peak.
How does the HM3 suffix differ from E3 or M3 in P6SMB20CAHM3_B/H?
The "HM3" suffix in P6SMB20CAHM3_B/H indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from "E3" (RoHS-compliant commercial grade) and "M3" (halogen-free RoHS-compliant commercial grade). The "_B/H" denotes packaging: 7" tape-and-reel (H) with AEC-Q101 qualification level B. The P6SMB20CAHM3_B/H meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability requirements.
P6SMB20CAHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 21.7A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB20CAHM3_B/H FAQ
1.How can I place an order for P6SMB20CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB20CAHM3_B/H on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for P6SMB20CAHM3_B/H reliable?
The price and inventory of P6SMB20CAHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB20CAHM3_B/H is usually 5 days.
3.What payment methods are accepted for P6SMB20CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB20CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB20CAHM3_B/H?
P6SMB20CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB20CAHM3_B/H order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for P6SMB20CAHM3_B/H?
For technical support, including P6SMB20CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB20CAHM3_B/H requirements.
6.How does Aetrix verify that P6SMB20CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All P6SMB20CAHM3_B/H products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that P6SMB20CAHM3_B/H meets industry standards.
7.What is the process for return or replacement of P6SMB20CAHM3_B/H?
All P6SMB20CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB20CAHM3_B/H, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The P6SMB20CAHM3_B/H part is unused and in its original packaging.
Return procedure for P6SMB20CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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